Cite

Sir Robt. Shirley from the collection of Petworth / [graphic]

MLA

Birrell, A., active 1770-1820, printmaker. Sir Robt. Shirley from the collection of Petworth / [graphic]. [1 May 1799]. https://collections.library.yale.edu/catalog/10986859.

APA, 6th edition

Birrell, A., active 1770-1820, printmaker. ([1 May 1799])[Sir Robt. Shirley from the collection of Petworth / [graphic]]. https://collections.library.yale.edu/catalog/10986859.